Analysis of user activity on GitHub on issues/PRs: adding/removing labels and commenting

1) I thought GrimoireLab provided information about comments posted on GitHub issues and pull requests. Where would I find this?

2) Since I'm looking at user activity on issues, where can I find information about when a user adds or removes a label from an issue/pull request?

I posted these two questions together because they relate to "activity" data and not "status" data. My suspicion is that they will be similar, but I'm actually learn more about what is possible already and what would require new development.

The relevant GitHub API seems to be https://developer.github.com/v3/issues/timeline/
specifically the events:
- labeled
- unlabeled
- commented